Add Watermark to PDF Online
Protect your intellectual property or label drafts by applying customizable text stamps (e.g. "CONFIDENTIAL", "DRAFT") or company logos to your PDF.
Choose PDF file or drop it here
Supported: .pdf • Max file size: 50MB
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Client-Side EncryptionYour files are processed temporarily in your browser memory and never stored on third-party servers. Sensitive data, passwords, and extracted document contents are never logged.
How to Add Watermark Online
Follow these 3 simple steps to process your document in seconds
Upload PDF
Select the document you want to watermark with text or an image logo.
Configure Watermark
Choose Text or Image mode. Customize text content, color, font size, rotation angle (-45° to +45°), opacity, and position.
Apply & Download
Click "Apply Watermark" to bake the watermark onto all or selected pages and download.
Why Use SumKaro Add Watermark?
Built for speed, uncompromising privacy, and enterprise-grade reliability
Text & Logo Image Support
Stamp custom text or upload your company PNG/JPG logo with transparent alpha blending.
Live Dynamic Positioning
Position watermarks at Center, Top-Left, Bottom-Right, or across a repeating Diagonal Tile grid.
Adjustable Opacity & Rotation
Fine-tune transparency from subtle background tints to prominent security stamps.
Frequently Asked Questions
Common questions about add watermark
Can I add a watermark to specific pages only?
Yes! You can choose to apply the watermark to all pages or specify custom pages (e.g. 1, 3, 5-8).
Can someone easily remove the applied watermark?
SumKaro embeds watermark objects directly into the PDF content stream, making casual removal difficult without specialized editing software.
Can I use transparent PNG logos?
Yes, transparent PNG files retain their alpha channel, blending seamlessly over existing text and images.
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